物理
电离
阿秒
阈上电离
激光器
波包
原子物理学
光离子化
干扰(通信)
里德伯公式
光子
电子
半经典物理学
连贯性(哲学赌博策略)
领域(数学)
作者
Sheng-Peng Zhou,Yu-Jun Yang,Dajun Ding
标识
DOI:10.1007/s11467-015-0523-8
摘要
Continuum wavepacket interference is investigated by numerically solving the time-dependent Schrodinger equation for the interaction of hydrogen atoms with laser fields. The obtained wavepacket evolution indicates that, in the over-the-barrier ionization regime (1016 W/cm2), the continuum–continuum (CC) interference of ionizing electrons becomes the main process in highorder harmonics generation (HHG), compared with continuum-bound (CB) transition, as reported by Kohler et al. [Phys. Rev. Lett. 105(20), 203902 (2010)].We propose a two-color laser field scheme for controlling the quantum trajectories of ionizing electrons and for extending the CC harmonic energy. As a result, a high energy platform occurs in the HHG spectrum, which entirely originates from the CC harmonics, with a cutoff adjustable by the relative phase of the two-color fields. This provides further understanding of the dynamic feature of atoms and molecules in super intense laser fields and provides an opportunity to image the atomic or molecular potential.
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